Lesson Plan
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Exploring the Hinge Theorem

For Teachers 9th - 10th
Learners explore the application of Hinge Theorem. In this geometry lesson, students write inequalities, given two sides of a triangle. They solve problems with triangular inequalities using the proper theorem.
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The Sierpinski Triangle

For Teachers 9th - 10th
Students investigate the Sierpinski triangle. In this geometry lesson plan, students define fractal curves and its relationship to triangles. They identify repeating sequences and relate it to fractals.
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Isosceles Triangles

For Teachers 9th - 10th
Students identify the properties of an isosceles triangle. In this geometry lesson plan, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.
Lesson Plan
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Median

For Teachers 9th - 11th
Students solve problems involving triangles. In this geometry instructional activity, students use the properties of triangles to find the angles and side. They identify the median and altitude of the triangle.
Lesson Plan
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Hospital Locator

For Teachers 7th - 9th
Students apply properties of triangles to the real world. In this geometry lesson, students identify the median and angle bisectors of triangles. They plan the appropriate are to place a new medical center based on their knowledge of...
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Lines In Geometry

For Teachers 8th - 10th
Students define important vocabulary words using a dictionary. In this geometry lesson plan, students identify and use properties of triangles to solve problems. They identify the median. altitude and angles as well as properties of...
Lesson Plan
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Right Triangles and The Pythagorean Theorem

For Teachers 8th - 9th
Learners play a game to reinforce concepts of the Pythagorean Theorem. In this geometry lesson, students find the missing angle and lengths of a right triangle. They use properties of trigonometry about sine, cosine and tangent to solve...
Worksheet
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Triangle worksheets

For Students 10th
In this geometry worksheet, 10th graders explore triangle properties, including the sum of the measures of the angles of a triangle, the triangle inequalities, properties of isosceles triangles, properties of congruent triangles, and...
Worksheet
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Sixteen Angle Pre-calculus Trig Problems

For Students 11th - Higher Ed
In this angle worksheet, students solve ten multiple choice and six free response questions.  These precalculus questions cover angles, radians, and right triangles.
Worksheet
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Volume of Triangular Prism

For Students 7th - 10th
In this volume worksheet, students read the measurements of triangular prisms.  They use the given information to compute the volume of triangular prisms.  This two-page worksheet contains six word problems.  Answers are...
Worksheet
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Classifying Triangles Worksheet 2

For Students 4th - 8th
In this classifying triangles instructional activity, learners classify triangles as either scalene, isosceles, or equilateral. Students complete 9 problems.
Worksheet
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Area Problem

For Students 8th - 12th
For this area problem, students solve a problem of the week.  They determine the area of a given figure.  This one-page worksheet contains 1 problem.  A detailed explanation to find the answer is provided.
Worksheet
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Finding the Angle Measurements in Isosceles Triangles

For Students 9th
In this angles worksheet, 9th graders find the angle measurements in four isosceles triangles.  Two of these triangles are drawn inside a circle, where two of the sides of the triangles are formed by radii.
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Identifying Triangles

For Teachers 6th
Sixth graders identify and define a variety of triangles. In this identification of triangles instructional activity, 6th graders draw examples of each triangle on a whiteboard, then complete a worksheet.
Worksheet
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Geometry Worksheet: Pythagoras' Theorem

For Students 6th - 8th Standards
In this Pythagorean Theorem worksheet, students use the Pythagorean Theorem to find the length of the unlabeled side of the right triangle. There are 8 problems all together.
Worksheet
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The Isosceles Triangle Problem

For Students 10th
In this geometry activity, 10th graders solve a problem involving an isosceles triangle.  The problem appears to be deceptively easy, but instead requires the use of trigonometry to arrive at a correct solution.  The one page...
Worksheet
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Area and Perimeter

For Students 10th
In this geometry worksheet, 10th graders use single variable equations to solve problems focusing on area and perimeter of triangles, trapezoids, parallelograms, rectangles, and hexagons.  The one page worksheet contains seventeen...
Worksheet
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Geometry Problem

For Students 10th
In this geometry learning exercise, 10th graders analyze an equilateral triangle which is divided into right triangles and determine missing lengths.  The one page learning exercise contains one problem.  Answer is provided.
Worksheet
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Triangles

For Students 6th - 10th
In this triangles activity, students solve for the missing angles and missing sides on the triangles given. Students complete 12 problems total.
Worksheet
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Math Club Warm Up #17b

For Students 6th
In this area learning exercise, 6th graders solve 2 problems about area, one with a square and one with a triangle; there are 4 sheets on a page.
Worksheet
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Area and Periemeter

For Students 10th
For this geometry worksheet, 10th graders determine the area and perimeters of various quadrilaterals and triangles.  The one page worksheet contains ten problems.  Answers are not provided. 
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Angles and Triangles

For Teachers 8th
Eighth graders examine Jewish symbols. In this Holocaust instructional activity, 8th graders discuss the meanings behind the Swastika and the Star of David. Students also measure the angles and shapes with the symbols.
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Identify triangles

For Teachers 9th - 10th
Students explore triangles. In this geometry lesson plan, students will create note cards with pictorial depictions of right, acute,obtuse, scalene, isosceles, equilateral and equiangular triangles. Students will verbally describe each...
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SAT Grid Practice Test 11

For Students 9th - 11th
In this SAT practice test, students compute the area and perimeter of polygons.  They determine the volume of a cylinder and solve problems with exponents.  This one-page worksheet contains 10 problems.  Answers are provided.